- stunnel-users - stunnel.org

Proxy support
by Reinier van der Gugten 18 Nov '08

18 Nov '08

Oops.. That's exactly what I meant... However What is the correct configuration in that case? E.g. I want to connect to an external location at: Myserver.com:443 The proxy is at: CustomerProxy:8080 And my application runs at the customer talking to: localhost:1433 The proxy does not require authentication. Looking at the docuemtation you linked me I found this example: CONNECT server.example.com:80 HTTP/1.1 Host: server.example.com:80 Proxy-Authorization: basic aGVsbG86d29ybGQ= Using my addresses, where goes what? CONNECT CustomerProxy:8080 HTTP/1.1 Host: Myserver.com:443 // Proxy-Authorization: basic aGVsbG86d29ybGQ= Kind regards, Reinier -----Original Message----- From: stunnel-users-bounces(a)mirt.net [mailto:stunnel-users-bounces@mirt.net] On Behalf Of Michal Trojnara Sent: vrijdag 14 november 2008 15:04 To: stunnel-users(a)mirt.net Subject: Re: [stunnel-users] Proxy support On Fri, 14 Nov 2008 14:53:20 +0100, "Reinier van der Gugten" <info(a)rgit.eu> wrote: > Has someone got a working version of STunnel that can handle a proxy? Do you mean client mode CONNECT protocol support (RFC 2817 section 5.2)? http://www.ietf.org/rfc/rfc2817.txt It's supported in stunnel since version 4.15 (released 2006.03.11). Best regards, Mike _______________________________________________ stunnel-users mailing list stunnel-users(a)mirt.net http://stunnel.mirt.net/mailman/listinfo/stunnel-users

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Re: [stunnel-users] Help - Getting stunnel compiled on windows and using a patch
by Reinier van der Gugten 14 Nov '08

14 Nov '08

Thanks so mucht for this information! I had to make the folowing changes as well: Set the Compile with common language runtime to: No common language runtime support for each .h file If I do that, the error: Command line error D8045: cannot compile C file 'src\client.c' with the /clr option disappears (Next I got an error in the resouce.rc file with the LTEXT VERSION... So I // that out) Next I get about 121 errors, like: Error LNK2001: unresolved external symbol _main ... symbol _num_clients etc. Any ideas? Kind regards, Reinier ________________________________ From: DMILE525 [mailto:dmile525@gmail.com] Sent: donderdag 13 november 2008 23:23 To: Reinier van der Gugten Subject: Re: [stunnel-users] Help - Getting stunnel compiled on windows and using a patch on Windows: install Win32 OpenSSL http://www.slproweb.com/products/Win32OpenSSL.html <wlmailhtml:{86BCE398-B6B8-40AD-8A3D-BE759753A203}mid://00000009/!x-usc: http://www.slproweb.com/products/Win32OpenSSL.html> install VS2008 (I'm using free VS2008 C++ Express Edition http://www.microsoft.com/express/download/ <wlmailhtml:{86BCE398-B6B8-40AD-8A3D-BE759753A203}mid://00000009/!x-usc: http://www.microsoft.com/express/download/> ) The first thing to do (assuming a default installation of 'C:\OpenSSL') is to go to 'C:\OpenSSL\lib\VC' and copy all of the files to your Visual C++ 'lib' directory. This directory is sometimes located in a somewhat cryptic location such as 'C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\lib' or 'C:\Program Files\Microsoft Visual Studio 9.0\VC\lib'. Next, copy everything in the 'C:\OpenSSL\include' directory to your Visual C++ 'include' directory. create new empty project add to project: stunnel.c ssl.c ctx.c verify.c file.c client.c protocol.c sthreads.c log.c options.c network.c resolver.c gui.c common.h prototypes.h resources.h stunnel.ico resources.rc "Configuration properties -> Linker -> input -> additional properties" add wsock32.lib ssleay32.lib libeay32.lib "Configuration properties -> General -> character set" set "Use Multi-Byte Character Set" in common.h after #ifndef COMMON_H #define COMMON_H add #define USE_WIN32 #define _CRT_SECURE_NO_DEPRECATE #define _CRT_NONSTDC_NO_DEPRECATE //#define HAVE_GETADDRINFO //#define HAVE_GETNAMEINFO #ifndef _MBCS #define _MBCS #endif #define VERSION "4.26" #if defined _M_IX86 #pragma comment(linker, "/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='x86' publicKeyToken='6595b64144ccf1df' language='*'\"") #elif defined _M_IA64 #pragma comment(linker, "/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='ia64' publicKeyToken='6595b64144ccf1df' language='*'\"") #elif defined _M_X64 #pragma comment(linker, "/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='amd64' publicKeyToken='6595b64144ccf1df' language='*'\"") #else #pragma comment(linker, "/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"") #endif On Wed, Nov 12, 2008 at 6:50 PM, Reinier van der Gugten <info(a)rgit.eu> wrote: Hello, I am trying to compile STunnel. I'd rather not, but the pre-compiled version does not support a proxy server. So I hop you will be able to help me, or point me to a good howto on how to compile stunnel using windows and a patch from the patch-list. Or does someone have a compiled (windows) version with proxy support? If so, please mail it to me. Or tell me where to find more detailed information pls. - Next thing I will try is to install linux on a computer in order to try it that way... Greetings, Reinier. _______________________________________________ stunnel-users mailing list stunnel-users(a)mirt.net http://stunnel.mirt.net/mailman/listinfo/stunnel-users

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Strange CRL verification behaviour
by Christophe Nanteuil 03 Nov '08

03 Nov '08

With stunnel 4.26 (or ealier), in order to verify revocation of clients' certificates, I use this configuration file : -------------------8<------------------ CAfile=/etc/ssl/stunnel/ca_certs.pem CRLfile=/etc/ssl/stunnel/crl.pem cert=/etc/ssl/stunnel/server.pem key=/etc/ssl/stunnel/server.key sslVersion=TLSv1 verify=2 [WEB] accept=8080 connect=127.0.0.1:3128 ------------------->8------------------ 1/ If there is no CRLfile when stunnel starts, stunnel dies and logs show "Failed to load /etc/ssl/stunnel/crl.pem revocation lookup file" -> ok. 2/ If the CRLfile is correct, stunnel starts. When the CRL expires, stunnel rejects any new connection. Logs then show : " Found CRL is expired - revoking all certificates until you get updated CRL" -> ok 3/ If the CRLfile is not a valid CRL, stunnel starts and ignores the CRLfile. Then, for any new connection, logs show "CRL: verification passed". -> NOT ok, IMO. examples of wrong CRLs : a CRL issued by an unknown CA or a certificate in the PEM format. This can happen when the CRL expires (soon) and the administrator puts a "new one" but misfits files. He then restarts stunnel, which works. This behaviour can be annoying because the logs of CRL are now in level 6 (INFO) and not any more in level 5 (NOTICE). My configuration was in debug=5 and logs showed only "CRL: verification passed", I could not determine what CRL was really used. I propose the attached patch to modify behaviour in case 3/, ie if no CRL corresponding to the issuer of each certificate of the chain is found : - reject connection if CRLdir or CRLfile was specified in the config file - accept connection but warn in logs if the use of CRL was not explicitly set in the config file. NB : the source code of function "crl_check" shows "/* based on BSD-style licensed code of mod_ssl */". I looked into the code of "mod_ssl-2.8.31-1.3.41" (file pkg.sslmod/ssl_engine_kernel.c, line 1601-1769) and there is actually the same behaviour. -- Christophe Nanteuil

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Spawning a shell
by Tobias Dussa 29 Oct '08

29 Oct '08

Hi everybody, maybe I'm missing something real obvious here, but I can't figure out what's going wrong. I'm trying to make stunnel spawn a regular shell when it gets a connect. As far as I understand, the pty option should allocate a virtual tty, so I ought to be able to just exec() a shell. However, this won't work; apparently some more magic is required. I do get the basic interactive functionality to work (i. e., I can enter, say, ls and get back a directory listing), but the terminal won't work properly: Unwanted echoes (stty -echo doesn't help). Furthermore, for some reason stderr is not connected to the new pty but sticks to stunnel's original pty. I have tried spawning a shell directly from stunnel (with exec), spawning a script which redirects stdin/-out/-err to the proper pty, then execs a shell, spawning a script which execs login, spawning a script which execs getty. (The latter being closest to what I want, but not good enough.) I'm running out of ideas. Anyone ever did this? Any comments? (Incidentally, if anyone has a better idea how to create the possibility to log in with an X.509 certificate without using stunnel, I'm all ears.) I'm running stunnel4 on Debian etch: --- stunnel 4.18 on i486-pc-linux-gnu with OpenSSL 0.9.8c 05 Sep 2006 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP Global options debug = 5 pid = /var/run/stunnel4.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH key = /etc/stunnel/stunnel.pem session = 300 seconds sslVersion = SSLv3 for client, all for server TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none --- Cheers, Toby. -- The nine most terrifying words in the English language are: I'm from the government and I'm here to help. ---Ronald Reagan

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Thanks for solving my problem!
by editor 20 Oct '08

20 Oct '08

Hi: Thanks! I commented out the "Verify" option within the configuration file and restarted the application. I can use it POP3S & HTTPS with the Nokia & Sony-Ericsson mobiles fine now as well as Thunderbird. I will check with Outlook next. Window's mobile is complaining it can not create a SSL session however. I think it has to do with the public certificate I use in the mail host. Godaddy uses this two part public certificate and the Network Solutions is a single file. I am hoping in a new release of Stunnel, it can support a two part public certificate. Thanks again!!! Kevin > > > > > > ------------------------------ > > > > Message: 2 > > Date: Sun, 19 Oct 2008 21:17:29 -0700 (PDT) > > From: Algol Tradent <tradent(a)yahoo.com> > > Subject: Re: [stunnel-users] Version 4.26 and using to secure IMAPS & > > POP3 > > To: stunnel-users(a)mirt.net > > Message-ID: <710279.38955.qm(a)web62003.mail.re1.yahoo.com> > > Content-Type: text/plain; charset=us-ascii > > > > Hello, > > > > I think your problem is on your config file for the server. On your config file you have the following option > > > > # Authentication stuff > > verify = 3 > > > > You probably don't want this option set. Because you are asking the client and the server to authenticate each other based on certificates... which I don;t think is the case here. > > > > On your log file there is this line which is a good indicator of your problem. > > > > routines:SSL3_GET_CLIENT_CERTIFICATE:peer did not return a certificate > > > > I hope this helps > >

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Version 4.26 and using to secure IMAPS & POP3
by Editor (Kevin) 20 Oct '08

20 Oct '08

Hi: I upgraded to the current 4.26 as I was having an issue with 4.15. The idea is to secure IMAP traffic as well as inbound SMTP. The email client is the latest Thunderbird and seems to be very stable. The mail Host is a Sun E-250 with current patches for Solaris 9. Note: I am using a public certificate and as it from "godaddy.com", it is this unusual two part certificate. This may be where the problem is as I had to combine the two public certificate files together (maybe the next version of STUNNEL could do this automatically so the risk of errors is reduced!). However, using STUNNEL, I am having an issue connecting as I get a strange error message and the connection dies. Error Log: 2008.10.19 13:10:41 LOG7[2104:1]: imaps accepted FD=0 from 80.38.96.194:4129 2008.10.19 13:10:41 LOG7[2104:3]: imaps started 2008.10.19 13:10:41 LOG7[2104:3]: FD 0 in non-blocking mode 2008.10.19 13:10:41 LOG7[2104:1]: Cleaning up the signal pipe 2008.10.19 13:10:41 LOG7[2104:3]: TCP_NODELAY option set on local socket 2008.10.19 13:10:41 LOG7[2104:3]: Waiting for a libwrap process 2008.10.19 13:10:41 LOG7[2104:3]: Acquired libwrap process #0 2008.10.19 13:10:41 LOG7[2104:1]: Cleaning up the signal pipe 2008.10.19 13:10:41 LOG7[2104:3]: Releasing libwrap process #0 2008.10.19 13:10:41 LOG7[2104:3]: Released libwrap process #0 2008.10.19 13:10:41 LOG7[2104:1]: Cleaning up the signal pipe 2008.10.19 13:10:41 LOG7[2104:3]: imaps permitted by libwrap from 80.38.96.194:4129 2008.10.19 13:10:41 LOG5[2104:3]: imaps accepted connection from 80.38.96.194:4129 2008.10.19 13:10:41 LOG7[2104:3]: SSL state (accept): before/accept initialization 2008.10.19 13:10:41 LOG7[2104:3]: SSL state (accept): SSLv3 read client hello A 2008.10.19 13:10:41 LOG7[2104:3]: SSL state (accept): SSLv3 write server hello A 2008.10.19 13:10:41 LOG7[2104:1]: Cleaning up the signal pipe 2008.10.19 13:10:41 LOG7[2104:3]: SSL state (accept): SSLv3 write certificate A 2008.10.19 13:10:41 LOG7[2104:3]: SSL state (accept): SSLv3 write certificate request A 2008.10.19 13:10:41 LOG7[2104:3]: SSL state (accept): SSLv3 flush data 2008.10.19 13:10:42 LOG7[2104:3]: SSL alert (read): warning: no certificate 2008.10.19 13:10:42 LOG7[2104:1]: Cleaning up the signal pipe 2008.10.19 13:10:42 LOG7[2104:3]: SSL alert (write): fatal: handshake failure 2008.10.19 13:10:42 LOG3[2104:3]: SSL_accept: 140890C7: error:140890C7:SSL routines:SSL3_GET_CLIENT_CERTIFICATE:peer did not return a certificate 2008.10.19 13:10:42 LOG7[2104:1]: Cleaning up the signal pipe 2008.10.19 13:10:42 LOG5[2104:3]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2008.10.19 13:10:42 LOG7[2104:1]: Cleaning up the signal pipe 2008.10.19 13:10:42 LOG7[2104:3]: imaps finished (0 left) See the weird no client peer handshake???? The configuration file: # more /usr/local/etc/stunnel/stunnel.conf # stunnel configuration file # Use to provide ssl protection for https, pop3 and imap # # Setting up the root jail chroot = /usr/local/var/stunnel # # The PID is created inside chroot jail pid = /stunnel.pid setuid = nobody setgid = nogroup ; Some security enhancements for UNIX systems - comment them out on Win32 chroot = /usr/local/var/lib/stunnel/ setuid = nobody setgid = nogroup ; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 # Authentication stuff verify = 3 # Certicates to use # cert = /usr/local/etc/stunnel/stunnel.pem CAfile = /usr/local/etc/stunnel/_.cellmail.com.crt # SSLCertificateChainFile = /usr/local/etc/stunnel/gd_intermediate_bundle.crt # Some debugging stuff debug = 7 output = /var/log/stunnel.log # Use it for client mode #client = yes # Service-level configuration [pop3s] accept = 199.4.110.39:995 connect = 110 [imaps] accept = 199.4.110.39:993 connect = 143 [ssmtp] accept = 199.4.110.39:465 connect = frog.cellmail.com:25 # TIMEOUTclose = 0 The startup log: 2008.10.19 13:02:50 LOG7[2077:1]: Snagged 64 random bytes from /export/home/kgreene/.rnd 2008.10.19 13:02:50 LOG7[2077:1]: Wrote 1024 new random bytes to /export/home/kgreene/.rnd 2008.10.19 13:02:50 LOG7[2077:1]: RAND_status claims sufficient entropy for the PRNG 2008.10.19 13:02:50 LOG7[2077:1]: PRNG seeded successfully 2008.10.19 13:02:50 LOG7[2077:1]: Certificate: /usr/local/etc/stunnel/stunnel.pem 2008.10.19 13:02:50 LOG7[2077:1]: Certificate loaded 2008.10.19 13:02:50 LOG7[2077:1]: Key file: /usr/local/etc/stunnel/stunnel.pem 2008.10.19 13:02:50 LOG7[2077:1]: Private key loaded 2008.10.19 13:02:50 LOG7[2077:1]: Loaded verify certificates from /usr/local/etc/stunnel/_.cellmail.com.crt 2008.10.19 13:02:50 LOG7[2077:1]: Loaded /usr/local/etc/stunnel/_.cellmail.com.crt revocation lookup file 2008.10.19 13:02:50 LOG7[2077:1]: SSL context initialized for service pop3s 2008.10.19 13:02:50 LOG7[2077:1]: Certificate: /usr/local/etc/stunnel/stunnel.pem 2008.10.19 13:02:50 LOG7[2077:1]: Certificate loaded 2008.10.19 13:02:50 LOG7[2077:1]: Key file: /usr/local/etc/stunnel/stunnel.pem 2008.10.19 13:02:50 LOG7[2077:1]: Private key loaded 2008.10.19 13:02:50 LOG7[2077:1]: Loaded verify certificates from /usr/local/etc/stunnel/_.cellmail.com.crt 2008.10.19 13:02:50 LOG7[2077:1]: Loaded /usr/local/etc/stunnel/_.cellmail.com.crt revocation lookup file 2008.10.19 13:02:50 LOG7[2077:1]: SSL context initialized for service imaps 2008.10.19 13:02:50 LOG7[2077:1]: Certificate: /usr/local/etc/stunnel/stunnel.pem 2008.10.19 13:02:50 LOG7[2077:1]: Certificate loaded 2008.10.19 13:02:50 LOG7[2077:1]: Key file: /usr/local/etc/stunnel/stunnel.pem 2008.10.19 13:02:50 LOG7[2077:1]: Private key loaded 2008.10.19 13:02:50 LOG7[2077:1]: Loaded verify certificates from /usr/local/etc/stunnel/_.cellmail.com.crt 2008.10.19 13:02:50 LOG7[2077:1]: Loaded /usr/local/etc/stunnel/_.cellmail.com.crt revocation lookup file 2008.10.19 13:02:50 LOG7[2077:1]: SSL context initialized for service ssmtp 2008.10.19 13:02:50 LOG5[2077:1]: stunnel 4.26 on sparc-sun-solaris2.9 with OpenSSL 0.9.8h 28 May 2008 2008.10.19 13:02:50 LOG5[2077:1]: Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP 2008.10.19 13:02:50 LOG6[2077:1]: file ulimit = 256 (can be changed with 'ulimit -n') 2008.10.19 13:02:50 LOG6[2077:1]: poll() used - no FD_SETSIZE limit for file descriptors 2008.10.19 13:02:50 LOG5[2077:1]: 125 clients allowed 2008.10.19 13:02:50 LOG7[2077:1]: FD 11 in non-blocking mode 2008.10.19 13:02:50 LOG7[2077:1]: FD 12 in non-blocking mode 2008.10.19 13:02:50 LOG7[2077:1]: FD 13 in non-blocking mode 2008.10.19 13:02:50 LOG7[2077:1]: SO_REUSEADDR option set on accept socket 2008.10.19 13:02:50 LOG7[2077:1]: pop3s bound to 199.4.110.39:995 2008.10.19 13:02:50 LOG7[2077:1]: FD 14 in non-blocking mode 2008.10.19 13:02:50 LOG7[2077:1]: SO_REUSEADDR option set on accept socket 2008.10.19 13:02:50 LOG7[2077:1]: imaps bound to 199.4.110.39:993 2008.10.19 13:02:50 LOG7[2077:1]: FD 15 in non-blocking mode 2008.10.19 13:02:50 LOG7[2077:1]: SO_REUSEADDR option set on accept socket 2008.10.19 13:02:50 LOG7[2077:1]: ssmtp bound to 199.4.110.39:465 2008.10.19 13:02:50 LOG7[2083:1]: Created pid file /stunnel.pid 2008.10.19 13:02:50 LOG7[2083:1]: Cleaning up the signal pipe

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forgeground=no with pppd and pty=yes?
by Sandeep Kumar 15 Oct '08

15 Oct '08

Hi, I want to encrypt pppd, but stunnel should start in background mode. But as soon as I set foreground=no, ppp is unable to connect. Is this not possible ? -- Sandeep Kumar http://students.iiit.ac.in/~sandeep_kr

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Setting up a POP3 connection through stunnel?
by Ben Stover 13 Oct '08

13 Oct '08

Assume currently I retrieve my emails from my mailbox unencrypted with the following info: pop3.mydomain.com port=110 Now I want to switch to an encrypted POP3 mail connection. with the following information pop3.mydomain.com port=777 Can I simply write now in the conf file: [myownsetup] accept = 127.0.0.1:110 connect = pop3.mydomain.com:777 Is this sufficient? Ben

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Question (new user!) how to get it to work? - SQL
by Reinier van der Gugten 10 Oct '08

10 Oct '08

Hi, I read most of the messages and tutorials, but still I do not seem to get it to work. I want to achieve the following: Client side: VB application communicating to a SQL server over port 1433. Server side: Lisning on port 1433 that is lisned to by SQL 2005. However this is not allowed evrywhere, so stunnel comes into play. Client side: VB application communicating to localhost on port 1433 Stunnel installed lisning on port 1433 and passing it on to port 80 (Note for later: I would like to use SSL, so it will pass through routers, But for the test it will suffice to keep it unencrypted. Also the server is still local and could be reached directly. But it should work fine for testing.) Server: Stunnel installed as service lisning on port 80 and transmitting it to port 1433 (later to be moved to 443, as I also run a HTTP server) The config file looks like this: ------------------------------------------------- Client: ; Sample stunnel configuration file by Michal Trojnara 2002-2006 ; Some options used here may not be adequate for your particular configuration ; Certificate/key is needed in server mode and optional in client mode ; The default certificate is provided only for testing and should not ; be used in a production environment cert = stunnel.pem ;key = stunnel.pem ; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 ; Workaround for Eudora bug ;options = DONT_INSERT_EMPTY_FRAGMENTS ; Authentication stuff ;verify = 2 ; Don't forget to c_rehash CApath ;CApath = certs ; It's often easier to use CAfile ;CAfile = certs.pem ; Don't forget to c_rehash CRLpath ;CRLpath = crls ; Alternatively you can use CRLfile ;CRLfile = crls.pem ; Some debugging stuff useful for troubleshooting ;debug = 7 ;output = stunnel.log ; Use it for client mode client = yes ; Service-level configuration [SQLServer] accept = 127.0.0.1:1433 connect = 10.12.18.10:80 ------------------------------------------------- Server: ; Sample stunnel configuration file by Michal Trojnara 2002-2006 ; Some options used here may not be adequate for your particular configuration ; Certificate/key is needed in server mode and optional in client mode ; The default certificate is provided only for testing and should not ; be used in a production environment cert = stunnel.pem ;key = stunnel.pem ; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 ; Workaround for Eudora bug ;options = DONT_INSERT_EMPTY_FRAGMENTS ; Authentication stuff ;verify = 2 ; Don't forget to c_rehash CApath ;CApath = certs ; It's often easier to use CAfile ;CAfile = certs.pem ; Don't forget to c_rehash CRLpath ;CRLpath = crls ; Alternatively you can use CRLfile ;CRLfile = crls.pem ; Some debugging stuff useful for troubleshooting ;debug = 7 ;output = stunnel.log ; Use it for client mode ;client = yes ; Service-level configuration [SQL] accept = 80 connect = localhost:1433 ------------------------------------------------- As you can see, I tried to keep as close to the example file as I could. Looking forward to getting this to work and then to including ssl... Kind regards, Reinier.

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Stunnel 4.26 Not working
by natalie burdick 30 Sep '08

30 Sep '08

I just upgraded from Sony to IBM laptop, in doing so, I installed latest version of Stunnel for use with my pop email client. I am running Stunnel 4.26 on Windows XP Here is my stunnel log: 2008.09.29 20:48:44 LOG5[2568:4088]: stunnel 4.26 on x86-pc-mingw32-gnu with OpenSSL 0.9.8i 15 Sep 2008 2008.09.29 20:48:44 LOG5[2568:4088]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2008.09.29 20:48:44 LOG5[2568:1628]: No limit detected for the number of clients It was working until I upgraded to this version, now when I use my client to check or send email, it just says that it's connecting to the server but never actually does. I can provide my conf

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